<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>06-选你爱我求和</title>
</head>

<body>
    <div id="app">
        <div>
            <div style="display: inline-block" v-for="(item, index) in arr" :key="index">
                <input type="checkbox" v-model="selectedItems" :value="item" />
                <span>{{ item }}</span>
            </div>
            <p>你选中的元素, 累加的值和为: {{ total }}</p>
        </div>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
                selectedItems: []
            },
            computed: {
                total() {
                    return this.selectedItems.reduce((sum, item) => sum + item, 0);
                }
            }
        })
    </script>
</body>

</html>